Shoutbox

Your problem reduced to the one relevant detail:  you moved the PC and it no longer works.  This can only mean a)you plugged things in wrong after moving it; or b)something came loose inside.

The only external devices you could have plugged in wrong and have such a problem are PS/2 style keyboard and mouse.  Usually it just causes them not to work, though.

For the second possibility, I'd suggest opening the computer and reseating (removing and putting back) all cards and your memory module(s).